Burner.



F. A. CURTIS.

BURNER.

ABPLIOA'I'ION rum) JULY 22, 1910.

Fig 1' WITNESSES .ZN'VE'NTUR Patented June 20, 1-911.

TTNT

FTQE.

FREDERIC A. CURTIS, OF TOLEDO, OHIO, ASSIGNOB, BY MESNE ASSIGNMENTS, TOTHE STEEL MANTLE LIGHT COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

BURNER.

Specification of Letters Patent.

Patented June 20, 1911.

Application filed July 22, 1910. Serial No. 573,232.

To all whom it may concern:

Be it known that I, Fnnnnnro A. Courts, a citizen of the United States,and a resident of Toledo, in the county of Lucas and State of Ohio, haveinvented a certain new and useful Burner; and I do hereby declare thefollowing to be a full, clear, and exact de scription of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a part ofthis specification.

My invention relates particularly to burners of the class adapted forthe burning of kerosene or other hydrocarbon oils of low gravity forilluminating purposes.

The object of my invention is to enhance the value and practicability ofburners of this class by the provision of an improved form of hoodwithin the burner dome, which cooperates with the dome and associatedparts to effect a more perfect combustion of the carbonaceous gasesrising from the burner wick while burning than has heretofore beenpossible.

The invention is fully described in the following specification, and,while in its broader aspect, it is susceptible of embodiment in numerousforms, a preferred embodiment thereof is illustrated in the accompanyingdrawings, in which,

Figure 1 is a plan view of a burner embodying the invention. Fig. 2 is asection on the line 00, m in Fig. 1 of the dome and associated partsthereof. Fig. 3 is a side elevation of the burner with a portion brokenaway, and Fig. t is a bottom view of the dome and associated parts.

Referring to the drawings, 1 designates the burner base, 2 the wick-tuberising therefrom, and 3 the dome, which is mounted upon the base overthe wick-tube and has the usual flame opening a in register with theupper end of such tube.

A burner-hood or supplemental dome 5 is mounted within the dome 3, beingpreferably substantially the shape of such dome but smaller'than it toprovide a space 6 therebetween, as shown, and having its top providedwith an elongated flame opening 7 in register with the dome opening 4and of greater width and length than the end of the wick-tube 2. Thelower edge of the hood 5 is turned or flared outwardly to extend acrossthe space 6, as shown at 8, and provided with a plurality of openings 8which open into the space 6 entirely around its bottom. The air whichpasses through the openings 8 becomes quite highly heated in its passagethrough the space 6, after which it commingles with the burning gasesrising from the wick and effects a more perfect burning of such gasesand makes a whiter and cleaner flame than would otherwise be the case.

The dome 3 is provided on its outer side adjacent the upper end of thehood or inner dome 5 with an encircling flange 9 having its outer edgeturned downwardly to form an overhanging ledge around the dome, asshown. This ledge is shown, in the present instance, as resting upon abead 10 around the outer side of such dome. Provided in the dome 3beneath the flange 9 are a plurality of openings 11 which admit air tothe space 6 between the two domes for the purpose of cooling the airpassing upwardly through the space 6, thus tending to check or retardthe flow of such air. It is found in burners in which this air coolingfeature is eliminated that the air rushes so rapidly through the space 6and flame opening 4 of the dome as to injure the flame due to the highlyheating of the air as it rises between the walls of the dome 3 and 5. Itis found, however, that by directing cooling air into the space 6adjacent the top thereof, that the air passing through such space iscooled and consequently retarded so as to act more gently upon the flameand prodducts of combustion rising from the wick.

The flange 9 has legs 12 depending from its downwardly turned edge,which legs project through openings in the wall of the dome 3 at thebase of the dome 5 and are bent upwardly under the flared lower edge ofthe dome 5 and into registering ones of openings 8" therein, thusserving to support both the dome 5 within the dome 3 and the outer edgeof the flange 9. Both of these parts may, however, be supported in anyother suitable manner.

I wish it understood that my invention is not limited to any specificconstruction or arrangement of the parts except in so far as suchlimitations are specified in the claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is,-

1. In a burner of the class described, the combination of a base, a maindome rising from such base, a supplemental dome mounted within such maindome and having a flame opening in register with the flame opening insaid main dome, said supplemental dome being substantially the shape ofbut smaller than said main dome and having its lower edge flaredoutwardly and secured to the main dome above its lower edge, said domescooperating to form an air space between the same, which space leads tosaid flame openings, said supplemental dome having its lower edgeprovided with openings to permit a restricted flow of air to said airspace from the interior of the lower portion of the main dome and saidmain dome being provided with openings for admitting air to said airspace above the bottom thereof, substantially as described.

2. In a burner of the class described, the combination of a main domehaving a flame opening therein, a supplemental dome mounted within suchmain dome and having a flame opening in register with the flame openingin said main dome and cooperating therewith to provide a surroundinginter mediate air space leading to the dome flame opening, saidsupplemental dome having its lower edge fashioned to permit a restrictedflow of air to such space and said main dome being provided withopenings for admitting air to such space above the bottom thereof, and aflange overhanging such main dome openings.

3. In a burnerof the class described, the combination of a dome, adeflector-hood therein, and a flange surrounding such dome, said domehaving openings therein beneath such flange for admitting air to theinterior thereof.

4. In a burner of the class described, the combination of a dome, adeflector-hood disposed therein and cooperating therewith to form anintermediate surrounding space, said hood having its lower edgefashioned to admit air to such space and an outwardly and downwardlyprojecting flange surrounding the dome adjacent the top of such hood,said dome having openings beneath such flange for admitting air to saidspace.

5. In a burner of the class described, the combination of a dome, adeflectonhood supported therein with its major portion in spacedrelation to the dome to form an intermediate air space with its loweredge perforated and flaring outwardly in substantial abutment with thedome wall, a flange encircling the dome and having depending legs whichproject through the dome wall and under the lower edge of such hood toserve to support the same, said dome having openings beneath said flangefor ad mitting air to the space between the dome and hood, substantiallyas described.

In testimony whereof, I have hereunto signed my name to thisspecification in the presence of two subscribing witnesses.

FREDERIC A. CURTIS. lVitnesses C. IV. OWEN, E. E. THOMAS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, I). G.

